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Strongly localized acoustic surface waves propagating along an immersed V-groove are numerically analyzed and experimentally demonstrated. We analyze the dispersion relation and the distribution of displacements of such groove waves using the compact two-dimensional finite-difference time-domain method. It is shown that they are dispersionless and strongly confined in the lateral cross section. The variations in their velocities as a function of the apex angle are also presented. Furthermore, we implement experimental observation by the near-field detection of these predicted waves in the 30° polymethyl methacrylate groove. The experimental measurements of the wave velocities agree very well with the numerical results.
Published in:
Applied Physics Letters
(Volume:94
,
Issue:
2
)
Date of Publication: Jan 2009
- Page(s):
- 023505 - 023505-3
- ISSN :
- 0003-6951
- Digital Object Identifier :
- 10.1063/1.3072346
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 18 June 2009
- Issue Date :
- Jan 2009
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